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Middle fossa vestibular neurectomy in retrolabyrinthine neurectomy failures.
Archives of Otolaryngology - Head & Neck Surgery 1992 October
Retrolabyrinthine vestibular nerve section is an important treatment option in patients with refractory, incapacitating vertigo. However, an indistinct cleavage plane between the cochlear and vestibular portions of the eighth cranial nerve may result in incomplete sectioning of the superior and inferior vestibular nerve fibers. We describe 11 patients in whom middle fossa vestibular neurectomy was performed following failure of a retrolabyrinthine vestibular neurectomy. A successful postoperative outcome from this revision surgery was obtained in six of 11 patients on follow-up evaluation. Patients in whom infrared video electronystagmography showed persistent function of the inferior vestibular nerve following retrolabyrinthine vestibular nerve section had a better response to middle fossa vestibular neurectomy than those with no measurable residual vestibular function. Because it provides access to the vestibular nerves where there is separation from the cochlear nerves distal to the previous section, we feel that the middle fossa vestibular neurectomy is the procedure of choice in selected patients who fail retrolabyrinthine neurectomy.
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